E308 - Animated keyframes invalid

Cause

An animated value's keyframes: list violates one of three rules: fewer than 2 entries; scroll positions not strictly increasing; two entries at the same scroll position.

Example

{ opacity: { keyframes: [[100, 1], [50, 0]] } }   // not sorted by scroll

How to fix

Provide at least two keyframes, sorted by scroll position, with no duplicate scroll values.